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Connecting a System Directly to Two Separate Power Sources
Electrical (AC) Power Planning
4-5
Connecting a System Directly to Two Separate Power Sources
If you do not connect your Express5800/320Ma 3.2 GHz or 3.6 GHz system or PDUs
to a UPS, provide two AC power sources that are as electrically independent of each
other as the installation site allows. At a minimum, the two power sources must be
powered by separate circuit breakers (maximum of 20A) to AC power and, if possible,
be independent of each other beyond that level. The more electrical separation
between the two power sources, the less likely they will both fail at the same time. Due
to redundancy in Express5800/320Ma 3.2 GHz and 3.6 GHz systems, power to either
side of the system keeps the system in operation, although the system is no longer
fault-tolerant with regard to power.
Figure 4-1
shows how to connect a rack-mounted Express5800/320Ma 3.2 GHz,
3.6GHz, or Dual-Core system directly to two separate AC power sources, and
Figure 4-2
shows how to connect a pedestal system directly to two separate power
sources.
Table 4-7. Worksheet: A-Side External Power Outlet Requirements - No PDUs
Component
Quantity
Outlets
Subtotal
Express5800/320Ma 3.2 GHz, 3.6
GHz, or Dual-Core
x
1
TOTAL NUMBER OF A-SIDE POWER OUTLETS
Table 4-8. Worksheet: B-Side External Power Outlet Requirements - No PDUs
Component
Quantity
Outlets
Subtotal
Express5800/320Ma 3.2 GHz, 3.6
GHz, or Dual-Core systems
x
1
TOTAL NUMBER OF B-SIDE POWER OUTLETS
Summary of Contents for Express5800/320Ma
Page 1: ...NEC Solutions America Inc NR573 Express5800 320Ma Site Planning Guide...
Page 10: ...Preface x Express5800 320Ma Site Planning Guide...
Page 18: ...System Documentation 1 8 Express5800 320Ma Site Planning Guide...
Page 40: ...Connecting a System Directly to a UPS 5 6 Express5800 320Ma Site Planning Guide...
Page 50: ...Sample PDU Usage Calculation 7 6 Express5800 320Ma Site Planning Guide...
Page 77: ...Standards Compliance Standards Compliance C 3 VCCI Note BSMI Note...
Page 78: ...Standards Compliance C 4 Express5800 320Ma Site Planning Guide...